JP2006078451A - Thermoplastic adhesive inspecting device and inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoplastic adhesive inspecting device capable of rapidly detecting the coating abnormality of a thermoplastic adhesive and preventing feed-out of a box body that is not normally coated with the thermoplastic adhesive, and an inspection method. <P>SOLUTION: The thermoplastic adhesive inspection device 1 has light source devices 3a and 3b for irradiating the thermoplastic adhesives 40 and 41 applied to the box body 6, which is molded by a box body molding machine 2, with light in the box body molding machine 2, imaging devices 4a and 4b for imaging the reflected light from the thermoplastic adhesive 40 and 41 and image processors 5a and 5b for processing the image data, sent from the imaging devices 4a and 4b, and comparing it with a prescribed value to decide whether the thermoplastic adhesives 40 and 41 are being applied normally. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inspection apparatus and an inspection method for a thermoplastic adhesive.

  Conventionally, as an invention of this type, there is an invention related to “a non-slip thermoplastic adhesive inspection apparatus” described in Patent Document 1. FIG. 30 is a side view of the thermoplastic adhesive inspection device 80 for preventing slipping. The anti-slip thermoplastic adhesive inspection device 80 injects the thermoplastic adhesive 82 from the thermoplastic adhesive injection member 81 and adheres it to the upper surface of the box 6 conveyed by the conveying member 83. It is a device that prevents the collapse of the load when the bodies 6 are stacked. The anti-slip thermoplastic adhesive inspection device 80 is disposed on the side of the path through which the thermoplastic adhesive 82 injected from the thermoplastic adhesive injection member 81 passes and is injected from the thermoplastic adhesive injection member 81. A detection member 84 that detects the presence or absence of the plastic adhesive 82 and outputs a detection signal, and whether or not the detection signal is input from the detection member 84 and the thermoplastic adhesive 82 is applied to the box 6 based on the detection signal And a control member (not shown) for determining the above.

According to this anti-slip thermoplastic adhesive inspection device 80, the thermoplastic adhesive 82 injected from the thermoplastic adhesive injection member 81 is sprayed onto the upper surface of the box 6 conveyed by the conveyance member 83. Applied. At this time, it is detected by the detection member 84 whether the thermoplastic adhesive 82 has been ejected from the thermoplastic adhesive injection member 81, and the detection signal is input to the control member. The control member determines whether or not the thermoplastic adhesive 82 is being injected from the thermoplastic adhesive injection member 81 based on the detection signal input from the detection member 84, and the thermoplastic adhesive is injected from the thermoplastic adhesive injection member 81. If it is determined that the adhesive 82 has not been sprayed, it is determined that the application of the thermoplastic adhesive 82 to the box 6 is abnormal.
JP-A-9-183404

  However, in the conventional thermoplastic adhesive inspection device 80, it has been determined whether or not the thermoplastic adhesive 82 is jetted from the thermoplastic adhesive jetting member 81 to the box 6, but the thermoplastic adhesive for the box 6 is determined. The position and amount of injection of 82 were not judged. Therefore, even when the thermoplastic adhesive 82 is sprayed on the box 6, there is a problem that the strength of the box 6 is lowered when the spraying position and amount with respect to the box 6 are not accurate. .

  The present invention has been made to solve the above-described problems of the prior art, and its purpose is to quickly detect abnormal application of the thermoplastic adhesive, and the thermoplastic adhesive is not normally applied. An object of the present invention is to provide a thermoplastic adhesive inspection device and an inspection method capable of preventing the box from being carried out.

  In the thermoplastic adhesive inspection device according to claim 1 of the present invention, the box spread sheet is bent, the thermoplastic adhesive is applied to a necessary portion of the box spread sheet, and the necessary is applied by the applied thermoplastic adhesive. In the thermoplastic adhesive inspection apparatus provided in the box forming apparatus that forms a box by adhering the parts, the thermoplastic adhesive provided in the box forming apparatus and applied to the necessary part of the box spread sheet A light source device that irradiates light, an image pickup device that is provided in the box forming device and picks up reflected light from the thermoplastic adhesive, and image data that is connected to the image pickup device and sent from the image pickup device By comparing any one or more of the area, vertical length, horizontal length, vertical position and horizontal position of the applied thermoplastic adhesive with a preset value. Is normal And having a determining image processing apparatus whether it is applied.

  In the thermoplastic adhesive inspection method according to claim 2 of the present invention, the box spread sheet is bent, the thermoplastic adhesive is applied to a necessary portion of the box spread sheet, and the applied thermoplastic adhesive is used. A step of irradiating the thermoplastic adhesive applied to the necessary part of the box unfolded sheet with light by a light source device provided in a box forming apparatus that forms a box by adhering the necessary part; and the box The process of imaging the reflected light from the thermoplastic adhesive by the imaging device provided in the molding device, and processing the image sent from the imaging device by the image processing device connected to the imaging device, By comparing any one or more of the area, vertical length, horizontal length, vertical position and horizontal position of the applied thermoplastic adhesive with a preset specified value, the thermoplastic adhesive can be Coating It is characterized in that it comprises a step of determining whether the.

  According to the present invention, the area, vertical length, horizontal length, vertical position, and horizontal position of the applied thermoplastic adhesive are compared by the image processing apparatus with preset values, and the thermoplastic adhesive is normally used. It can be determined whether it is applied. Therefore, it is possible to quickly detect abnormal application of the thermoplastic adhesive, and to prevent the box body not properly coated with the thermoplastic adhesive from being carried out.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a thermoplastic adhesive inspection apparatus according to an embodiment of the present invention.
In FIG. 1, a thermoplastic adhesive inspection apparatus 1 includes two top lighting devices (light source devices) 3a, four side lighting devices (light source devices) 3b, and two top lighting devices in a box forming device 2. A camera (imaging device) 4a, four side cameras (imaging devices) 4b, image processing devices 5a and 5b, and a control device 7 are provided.

  As shown in FIG. 1, the two top lighting devices 3 a are attached at a constant interval in a direction orthogonal to the box conveying direction (left and right direction in FIG. 1) of the box forming device 2. The hot melt (thermoplastic adhesive) 40 applied to the top flap 29 is irradiated with light. The four side lighting devices 3b are attached at regular intervals horizontally to the left and right sides with respect to the box conveying direction of the box forming apparatus 2, and the inner side flaps 25, 26, 30 and 31 of the box 6 are provided. The hot melt 41 applied to the substrate is irradiated with light.

The two top cameras 4 a are mounted side by side with the top lighting device 3 a in a direction orthogonal to the box conveying direction of the box forming apparatus 2, and receive reflected light from the hot melt 40.
The four side cameras 4b are mounted side by side with the side lighting devices 3b on the left and right sides in the horizontal direction with respect to the box conveying direction of the box forming device 2 so as to receive the reflected light from the hot melt 41. It has become.

The top camera 4a is connected to the image processing device 5a, and the side camera 4b is connected to the image processing device 5b, so that a captured image is transmitted.
FIG. 2 is a front view of the box expansion sheet 20. FIG. 3 is a perspective view showing a state where the box 6 is being formed on the box forming apparatus 2. FIG. 4 is a perspective view showing a correspondence relationship between the box 6 and the top camera 4a, the side camera 4b, the top lighting device 3a, and the side lighting device 3b.

  In FIG. 2, the box unfolding sheet 20 includes a bottom panel 22, a side panel 23 connected to the side of the bottom panel 22 in the width direction (left and right direction in FIG. 2) via a fold line 35, The top panel 21 connected to the side portion in the width direction via the fold line 34, the side panel 24 connected to the side portion in the width direction of the bottom panel 22 via the fold line 36, and the side panel 24 The top flap 29 connected to the side in the width direction via a fold line 37 and the outside connected to the both ends of the bottom panel 22 in the longitudinal direction (vertical direction in FIG. 2) via a fold line 38. Side flaps 28 and 33, outer side flaps 27 and 32 connected to both longitudinal ends of the top panel 21 via a folding line 38, and folding lines 39 to both longitudinal ends of the side panel 23. The side flaps 25 and 30 among which are continuously provided through, is formed from the side flaps 26 and 31. Among which is continuously provided through the longitudinal ends fold line 39 of the side panel 24.

  As illustrated in FIG. 3, the box unfolding sheet 20 is installed in the box forming apparatus 2 with the top flap 29 on the upstream side in the conveyance direction. The box forming apparatus 2 bends the box unfolded sheet 20 through the folding lines 34, 35, 36, and 37 to fold the top panel 21, bottom panel 22, side panel 23, side plate panel 24, and top flap 29. After that, hot melt 40 is arranged in the longitudinal direction on the outer surface of the top flap 29 by a melt gun (not shown) and applied at a plurality of locations (six locations in this embodiment), and the end of the top panel 21 is adhered to the applied portion. Then, it is formed into a substantially rectangular tube shape. Next, the inner side flaps 25, 26, 30 and 31 are bent through a fold line 39, and hot melts 41 are arranged in the width direction on each inner side flap by a melt gun (not shown) to provide a plurality of locations (in this embodiment, each two Location) After coating, the outer side flaps 27, 28, 32 and 33 are bent and bonded to the inner side flaps 25, 26, 30 and 31, whereby the box 6 is formed.

  In the above flow, after applying the hot melt 40 to the top flap 29, before bonding the end of the top panel 21 and after applying the hot melt 41 to each inner side flap, before bonding to each outer side flap, FIG. As shown in FIG. 4, the top lighting device 3 a emits light to the melt 40, and the side lighting device 3 b emits light to the hot melt 41. Then, the top camera 4a images the reflected light of the light irradiated to the melt 40, and the side camera 4b images the reflected light of the light irradiated to the melt 41. In this case, the top illumination device 3a and the side illumination device 3b are preferably UV fiber illumination, but may be illumination other than UV fiber illumination. The top camera 4a and the side camera 4b are preferably CCD cameras provided with a UV cut filter, but may not be provided with a UV cut filter, and may be cameras other than a CCD camera. It doesn't matter.

  FIG. 5 is a flowchart showing processing of a captured image in the image processing apparatus 5a. FIG. 6 is a flowchart showing processing of a captured image in the image processing device 5b. FIG. 7 is a front view of an inspection region image of hot melt applied to the top flap. FIG. 8 is a front view of the background image. FIG. 9 is a front view of the shading correction image. FIG. 10 is a front view of the binarized image. FIG. 11 is a front view of a closing image. FIG. 12 is a front view of the opening process image. FIG. 13 is a front view of a longitudinal length measurement image. FIG. 14 is a front view of a horizontal length measurement image. FIG. 15 is a front view of a vertical displacement measurement image. FIG. 16 is a front view of a lateral displacement measurement image.

The processing in the image processing device 5a will be described with reference to FIG. 5. First, in step S101, the captured image captured by each top camera 4a is input to the image processing device 5a.
Then, in step S102, the inspection area image 45 shown in FIG. 7 is determined from the captured image input to the image processing device 5a. The inspection area image 45 includes a hot melt part 46, a background part 47, and a hot melt stringing part 48.

Next, in step S103, as shown in FIG. 8, the background portion 47 is extracted from the inspection region image 45, and a background image 49 is created.
Then, in step S104, as shown in FIG. 9, a difference between the inspection area image 45 and the background image 49 is taken to perform a shading process that eliminates the influence of luminance unevenness of the background portion 47, and the shading correction image 50 is displayed. Created.

In step S105, as shown in FIG. 10, white and black are used to facilitate measurement of hot melt feature quantities (area, length, etc.) using a binary threshold value preset for each inspection region. And binarized image 51 is created. In the binarization process, in the binarized image 51 after the binarization process, as shown in FIG. 10, a hole (noise) 52 may be generated in the hot melt part 46.
In S106, as shown in FIG. 11, a closing process for filling a hole (noise) 52 formed in the hot melt part 46 at the time of binarization is performed, and a closing process image 53 is created.
In step S107, as shown in FIG. 12, an opening process for removing the hot melt stringing section 48 is performed, and an opening process image 54 is created.

  After that, in step S108, the area, the vertical length, the horizontal length, the vertical position deviation, and the horizontal position deviation are measured. In the area measurement process, as shown in FIG. 12, the number of pixels in the white part of the opening process image 54 is counted and used as the area. In the vertical length measurement process, as shown in FIG. 13, the vertical length a of the hot melt part 46 in the opening processed image 54 in the longitudinal direction (vertical direction in FIG. 13) is measured, and the resolution is converted to millimeters. To do. In the horizontal length measurement process, as shown in FIG. 14, the horizontal length b in the width direction (left-right direction in FIG. 14) of the hot melt portion 46 of the opening processing image 54 is measured, and the resolution is converted to millimeters. To do. In the measurement processing of the vertical position deviation, as shown in FIG. 15, the gravity center position 55 of the hot melt portion 46 of the opening processing image 54 is obtained, and the longitudinal component e of the gravity center position 55 and the longitudinal direction of the opening processing image 54 are obtained. The vertical deviation from the center position c is measured, and the resolution is converted to millimeters. In the lateral displacement measurement process, as shown in FIG. 16, the lateral displacement between the center-of-gravity position 55 width direction component f of the hot melt portion 46 of the opening processing image 54 and the center position d of the opening processing image 54 in the width direction is measured. The resolution is converted to millimeters.

  FIG. 17 is a front view of an inspection region image of hot melt applied to each inner side flap. FIG. 18 is a front view of the black print removed image. FIG. 19 is a front view of the opening process image. FIG. 20 is a front view of the contour extraction image. FIG. 21 is a front view of a binarized image of an outline. FIG. 22 is a front view of a contour connection image. FIG. 23 is a front view of a contour hole filling image. FIG. 24 is a front view of the contracted image. FIG. 25 is a front view of an inspection area frame setting image after hot melt extraction. FIG. 26 is a front view of a longitudinal length measurement image. FIG. 27 is a front view of a horizontal length measurement image. FIG. 28 is a front view of a vertical displacement measurement image. FIG. 29 is a front view of a lateral displacement measurement image.

Next, processing in the image processing device 5b will be described with reference to FIG. 6. First, in step S201, a captured image captured by each side camera 4b is input to the image processing device 5b.
In step S202, the captured image is reduced, and the horizontal width of the captured image is reduced by a factor of two.
Next, in step S203, as shown in FIG. 17, an inspection region image 56 is determined for the reduced captured image. Since each flap does not appear in a rectangle, the inspection area image 56 is set as a quadrangular area that matches the way the flaps are captured. The inspection area image 56 includes a hot melt part 57, a background part 58, and a hot melt stringing part 59.
In step S204, as shown in FIG. 18, a closing process for removing black printing or the like in the background portion 58 is performed, and a black print removal image 60 is created.

In step S205, as shown in FIG. 19, an opening process for removing the hot melt stringing section 59 is performed, and an opening process image 61 is created.
In step S206, as shown in FIG. 20, the Sobel filter process for extracting the contour portion 63 of the hot melt portion 57 is performed, and the contour extraction image 62 is created.
In step S207, as shown in FIG. 21, a binarization threshold value set in advance for each inspection region is used, and the contour portion 63 is divided into white and the background portion 58 is divided into black in order to clarify the contour portion 63. A binarized image 64 of the contour is created. In the binarization processing, in the binarized image 64 of the contour after the binarization processing, as shown in FIG. 21, a discontinuous portion 65 may occur in the contour portion 63, and the inside of the contour portion 63 is A hole 66 is formed.

In step S208, as shown in FIG. 22, a closing process for connecting the discontinuous portion 65 of the contour portion 63 is performed, and a contour connection image 67 is created.
In step S209, as shown in FIG. 23, a closing process is performed to fill the hole portion 66 inside the contour portion 63 to form the hot melt portion 69, and a contour hole-filled image 68 is created.

In step S210, as shown in FIG. 24, since the hot melt part 69 is extracted larger than the actual melt at the time of contour extraction, the hot melt part 69 contracts to the original size and is subjected to an erosion process as the hot melt part 71. A contracted image 70 is created.
In step S211, an inspection area frame 73 is set for the contracted image 70, and an inspection area frame setting image 72 is created.

  Thereafter, in step S212, measurement processing of area, vertical length, horizontal length, vertical position shift, and horizontal position shift is performed. In the area measurement process, as shown in FIG. 25, the number of pixels in the white portion of the inspection region frame setting image 72 is counted and set as the area. In the vertical length measurement process, as shown in FIG. 26, the vertical length g of the hot melt portion 71 of the inspection region frame setting image 72 in the width direction (vertical direction in FIG. 26) is measured, and the number of pixels is changed to millimeters. Convert resolution. In the horizontal length measurement process, as shown in FIG. 27, the horizontal length h in the longitudinal direction (left-right direction in FIG. 27) of the hot melt portion 71 of the inspection area frame setting image 72 is measured, and the number of pixels is changed to millimeters. Convert resolution. In the vertical displacement measurement process, as shown in FIG. 28, the center of gravity position 74 of the hot melt portion 71 of the inspection area frame setting image 72 is obtained, and the width direction component k of the center of gravity position 74 and the width of the inspection area frame 73 are obtained. The vertical deviation from the center position i of the direction is measured, and the resolution is converted to millimeters. In the measurement process of the lateral displacement, as shown in FIG. 29, the longitudinal direction component l of the center of gravity position 74 of the hot melt part 71 and the longitudinal center position j of the inspection region frame 73 in the inspection region frame setting image 72 are obtained. The lateral shift is measured, and the resolution is converted to the number of pixels in millimeters.

  Each inspection item of area, vertical length, horizontal length, vertical position deviation, and horizontal position deviation measured by the image processing apparatus 5a and the image processing apparatus 5b includes a preset inspection parameter range (preset value). It is compared and judged for each inspection item of OK, NG, and SUSPECT. Then, an OK signal is output to the control device 7 only when all inspection areas and all inspection items are OK. If any one is NG, NG is output, there is no NG, and there is only one SUSPECT. In this case, SUSPECT is output. Further, when the SUSPECT signal is continuously output, an inspection signal is output.

  When receiving the NG signal, the control device 7 that has received the OK or NG signal from the image processing device 5a and the image processing device 5b removes the box 6 related to the NG signal from the box forming device 2. Command is output. Thereby, abnormal application of the thermoplastic adhesive can be quickly detected, and the box body to which the thermoplastic adhesive is not normally applied can be prevented from being carried out.

  In the present embodiment, the hot melts 40 and 41 are respectively applied to the top flap 29 or the inner side flaps 25, 26, 30 and 31, but the hot melts 40 and 41 are not limited to such places. You may apply | coat to a part required for shaping | molding. In the present embodiment, the image processing apparatuses 5a and 5b measure and determine all the area, vertical length, horizontal length, vertical position, and horizontal position of the applied thermoplastic adhesive. It is not limited to the case, and one of area, vertical length, horizontal length, vertical position, and horizontal position may be measured and determined.

It is a block diagram of the thermoplastic adhesive test | inspection apparatus which concerns on one embodiment of this invention. It is a front view of a box expansion sheet. It is a perspective view which shows the state in the middle of a box body being formed on a box formation apparatus. It is a perspective view which shows the correspondence of a box, a top camera, a side camera, a top lighting device, and a side lighting device. It is a flowchart figure showing the process of the captured image in an image processing apparatus. It is a flowchart figure showing the process of the captured image in an image processing apparatus. It is a front view of the test | inspection area | region image of the hot melt apply | coated to the top flap. It is a front view of a background image. It is a front view of a shading correction image. It is a front view of a binarized image. It is a front view of a closing processing picture. It is a front view of an opening process image. It is a front view of a vertical length measurement image. It is a front view of a horizontal length measurement image. It is a front view of a vertical position shift measurement image. It is a front view of a horizontal position shift measurement image. It is a front view of the test | inspection area | region image of the hot melt apply | coated to each inner side flap. It is a front view of a black printing removal image. It is a front view of an opening process image. It is a front view of an outline extraction image. It is a front view of the binarized image of an outline. It is a front view of the connection image of an outline. It is a front view of the outline hole-filling image. It is a front view of a contraction image. It is a front view of the inspection area frame setting image after hot melt extraction. It is a front view of a vertical length measurement image. It is a front view of a horizontal length measurement image. It is a front view of a vertical position shift measurement image. It is a front view of a horizontal position shift measurement image. It is a side view of the conventional thermoplastic adhesive test | inspection apparatus for slip prevention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermoplastic adhesive test | inspection apparatus 2 Box body shaping | molding apparatus 3a Top illumination apparatus 3b Side illumination apparatus 4a Top camera 4b Side camera 5a Image processing apparatus 5b Image processing apparatus 6 Box 7 Control apparatus 20 Box expansion sheet 21 Top Surface panel 22 Bottom panel 23 Side panel 24 Side panel 25 Inner side flap 26 Inner side flap 27 Outer side flap 28 Outer side flap 29 Top flap 30 Inner side flap 31 Inner side flap 32 Outer side flap 33 Outer side flap 34 Folding line 35 Folding line 36 Folding line 37 Folding line 38 Folding line 39 Folding line 40 Hot melt 41 Hot melt 45 Inspection area image 46 Hot melt part 47 Background part 48 Hot melt stringing part 49 Background image 50 Shading correction image 51 Binarized image 52 holes (noise)
53 Closing processing image 54 Opening processing image 55 Center of gravity position 56 Inspection area image 57 Hot melt part 58 Background part 59 Hot melt stringing part 60 Black print removal image 61 Opening processing image 62 Contour extraction image 63 Contour part 64 Contour binary Image 65 Discontinuity portion 66 Hole portion 67 Contour connection image 68 Contour hole filling image 69 Hot melt portion 70 Shrinkage image 71 Hot melt portion 72 Inspection region frame setting image 73 Inspection region frame 74 Center of gravity position a Vertical length b Horizontal length c Long Center position d in the width direction Center position e in the width direction Longitudinal component f Width component g Vertical length h Horizontal length i Center position in the width direction j Center position in the longitudinal direction k Width direction component l Longitudinal component S101 Captured image input S102 Inspection Region image determination S103 Background image creation S104 Shading process S105 Binary Process S106 Closing process S107 Opening process S108 Measurement process S201 Captured image input S202 Reduction of captured image S203 Determination of inspection area image S204 Closing process S205 Opening process S206 Sobel filter process S207 Binary process S208 Closing process S209 Closing process S210 Erosion process S211 Inspection area frame setting S212 Measurement processing 80 Anti-slip thermoplastic adhesive inspection device 81 Thermoplastic adhesive injection member 82 Thermoplastic adhesive 83 Conveying member 84 Detection member

Claims (2)

It is provided in a box forming apparatus that forms a box by bending a box development sheet, applying a thermoplastic adhesive to a necessary part of the box development sheet, and bonding the necessary part with the applied thermoplastic adhesive. In thermoplastic adhesive inspection equipment,
A light source device for irradiating light to a thermoplastic adhesive applied to a necessary part of the box spread sheet provided in the box forming device, and a reflection from the thermoplastic adhesive provided in the box forming device. An image pickup device that picks up light, and is connected to the image pickup device and processes image data sent from the image pickup device. The area, vertical length, horizontal length, vertical position, and horizontal position of the applied thermoplastic adhesive An image processing apparatus that determines whether the thermoplastic adhesive is normally applied by comparing at least one of the above and a preset value. Agent inspection device.   It is provided in a box forming apparatus which is a box body by bending a box development sheet, applying a thermoplastic adhesive to a necessary part of the box development sheet, and bonding the necessary part with the applied thermoplastic adhesive. The light source device irradiates light to the thermoplastic adhesive applied to the necessary part of the box spread sheet, and the reflected light from the thermoplastic adhesive by the imaging device provided in the box forming device. And an image processing device connected to the imaging device to process the image sent from the imaging device, and the area, vertical length, horizontal length, vertical position of the applied thermoplastic adhesive, and Comparing any one or more of the lateral positions with a predetermined value set in advance to determine whether the thermoplastic adhesive is normally applied. Adhesive inspection method.